22439569 has 2 divisors, whose sum is σ = 22439570. Its totient is φ = 22439568.

The previous prime is 22439561. The next prime is 22439579. The reversal of 22439569 is 96593422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22439169 + 400 = 4737^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 22439569 - 2³ = 22439561 is a prime.

It is a super-2 number, since 2×22439569² = 1007068513811522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22439561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11219784 + 11219785.

It is an arithmetic number, because the mean of its divisors is an integer number (11219785).

Almost surely, 2^22439569 is an apocalyptic number.

It is an amenable number.

22439569 is a deficient number, since it is larger than the sum of its proper divisors (1).

22439569 is an equidigital number, since it uses as much as digits as its factorization.

22439569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 22439569 is about 4737.0422206267. The cubic root of 22439569 is about 282.0578365017.

It can be divided in two parts, 224 and 39569, that added together give a palindrome (39793).

The spelling of 22439569 in words is "twenty-two million, four hundred thirty-nine thousand, five hundred sixty-nine".